/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard;

import java.util.List;

import proguard.classfile.util.ClassUtil;
import proguard.classfile.util.WarningPrinter;

/**
 * This class checks if the user has forgotten to specify class members in some keep options in the configuration.
 *
 * @author Eric Lafortune
 */
public class KeepClassMemberChecker {
    private final WarningPrinter notePrinter;

    /**
     * Creates a new KeepClassMemberChecker.
     */
    public KeepClassMemberChecker(WarningPrinter notePrinter) {
        this.notePrinter = notePrinter;
    }

    /**
     * Checks if the given class specifications try to keep class members without actually specifying any, printing
     * notes if necessary.
     */
    public void checkClassSpecifications(List keepClassSpecifications) {
        if (keepClassSpecifications != null) {
            for (int index = 0; index < keepClassSpecifications.size(); index++) {
                KeepClassSpecification keepClassSpecification =
                    (KeepClassSpecification)keepClassSpecifications.get(index);

                if (!keepClassSpecification.markClasses
                    && (keepClassSpecification.fieldSpecifications == null
                        || keepClassSpecification.fieldSpecifications.size() == 0)
                    && (keepClassSpecification.methodSpecifications == null
                        || keepClassSpecification.methodSpecifications.size() == 0)) {
                    String className = keepClassSpecification.className;
                    if (className == null) {
                        className = keepClassSpecification.extendsClassName;
                    }

                    if (className == null || notePrinter.accepts(className)) {
                        notePrinter.print(className,
                            "Note: the configuration doesn't specify which class members to keep for class '"
                                + (className == null ? ConfigurationConstants.ANY_CLASS_KEYWORD
                                    : ClassUtil.externalClassName(className))
                                + "'");
                    }
                }
            }
        }
    }
}
